The Commons

Back to Results

Patent Title: Method and system for variable password access

Assignee: IBM
Patent Number: US5682475
Issue Date: 10-28-1997
Application Number:
File Date:12-30-1994

Abstract: A method and system are provided for controlling access to a data processing system through the use of a variable password. In one embodiment, the invention substitutes the value of a variable into an expression contained in a predefined password, evaluates the expression and password, and compares the result of the valuation of the password to a character string input to the data processing system, granting access if they are identical. A range of values of certain characters of the password may be permitted. The password may require that certain characters be entered within a defined time interval measured from the entry of other characters. The values of environment variables, which are referenced by the variable password, may change from time to time, as a function, for example, of the current time or temperature or system utilization.


Link to USPTO

IBM Pledge dated 1/11/2005